The thing about governments is they are just as tyrannical as the corporations. "Any network we cannot surveil and dominate is banned" is absolutely within the realm of possibility.

Then the government would be banning the gathering of people. At that point we're pretty fucked.

Citizens creating informal horizontal networks between themselves is threatening to social harmony, and as more states around the world learn from the highly successful Chinese model, they are unlikely to permit the Wild West à la the old-school internet you are thinking about.